public async Task Should_Finish_Quiz()
{
var command = new FinishQuizCommand()
{
UserName = "******",
Answers = new List <QuizAnswerDto>()
{
new QuizAnswerDto()
{
QuestionId = _question1Id, AnswerId = _answer1Id
},
new QuizAnswerDto()
{
QuestionId = _question2Id, AnswerId = _answer2Id
},
new QuizAnswerDto()
{
QuestionId = _question3Id, AnswerId = _answer3Id
},
new QuizAnswerDto()
{
QuestionId = _question4Id, AnswerId = _answer4Id
},
}
};
var result = await _service.FinishQuiz(command);
result.Success.Should().BeTrue();
}
public async Task Should_Calculate_Quiz_Result_75_Percent()
{
var command = new FinishQuizCommand()
{
UserName = "******",
Answers = new List <QuizAnswerDto>()
{
new QuizAnswerDto()
{
QuestionId = _question1Id, AnswerId = _answer1Id
},
new QuizAnswerDto()
{
QuestionId = _question2Id, AnswerId = _answer1Id
},
new QuizAnswerDto()
{
QuestionId = _question3Id, AnswerId = _answer3Id
},
new QuizAnswerDto()
{
QuestionId = _question4Id, AnswerId = _answer4Id
},
}
};
var result = await _service.CalculateResult(command);
result.Should().Be(75);
}
public async Task <double> CalculateResult(FinishQuizCommand command)
{
var questionIds = command.Answers.Select(question => question.QuestionId).ToList();
var questionsQuery = await _questionRepository.GetAll(questionIds);
var questions = questionsQuery.Select(question => new
{
QuestionId = question.Id,
AnswerId = question.Answers.FirstOrDefault(answer => answer.Correct).Answer.Id
});
var rightAnswers = questions.Count(question => command.Answers.Any(answer => answer.QuestionId == question.QuestionId && answer.AnswerId == question.AnswerId));
return(((double)rightAnswers / questionIds.Count) * 100);
}
public async Task <Result <QuizResultResponse> > FinishQuiz(FinishQuizCommand command)
{
var validationResult = Validate(_finishQuizCommandValidator.Validate(command));
if (!validationResult.Success)
{
return(validationResult);
}
var quizResult = await CalculateResult(command);
var quiz = new Quiz(command.UserName, quizResult);
await _quizRepository.Add(quiz);
return(new Result <QuizResultResponse>(QuizResultResponse.ToResponse(quiz)));
}
public ValidationResult Validate(FinishQuizCommand command)
{
var result = new ValidationResult();
if (string.IsNullOrEmpty(command.UserName))
{
result.AddMessage(QuizValidationMessages.NAME);
}
if (!command.Answers.Any())
{
result.AddMessage(QuizValidationMessages.NO_ANSWERS);
}
if (command.Answers.Any(answer => answer.AnswerId == null || answer.AnswerId.Equals(Guid.Empty)))
{
result.AddMessage(QuizValidationMessages.ANSWER);
}
return(result);
}
public async Task <Result <QuizResultResponse> > Finish([FromBody] FinishQuizCommand command) => await _quizResultService.FinishQuiz(command);
